Paekee steves



(No Model.)

P. STBVES.

DEVICE EOE OPERATING THE DOORS OE MINE SEAETS. No. 373,105. PatentedNOV. 15, 1887.

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PARKER STEVES, OF ASPEN, COLORADO.

DEVICE FOR OPERATING THE DOORS OF MINE-SHAFTS.

SPECIFICATION forming part of Letters Patent No. 373,105, dated November15, 1887.

Application liled April 2D, 1887.

To all whom, it may concern:

Be it known that l, PARKER Sfrnvns, a citizen of the UnitedStates,residing at Aspen, in the county of Pitkin and State ot'Colorado, have invented a new and useful Improvement in Devices forOperating the Doors of Mine- Shafts, ofwhich the following is aspecification.

My invention relates to an improvement in devices for operating thedoors ol' mine-shafts; ,and it consists in the peculiar construction andcombination of devices,that will be more fully set forth hereinafter,and particularly pointed out in the claims. i

In the drawings, Figure l is an elevation of an apparatus embodying myimprovements, showing the doors closed. Fig. 2 is a similar view of thesame, showing the doors open. Fig. 3 is a top plan view of Fig. 2. Fig.4 is a detail View of one of the connecting-links.

A represents a platform,which is erected on one side of the mine-shaft.B represents the lcasing of the shaft, and C represents the doors,-Which are hinged at their outer sides and close together at their freeedges, so as to close the shaft. v

D represents the frame,whieh is triangular in end elevation, and whichsupports the doors when the latter are closed.

To one end of the frameD is attached a pair of vertical guide-rods, E,which extend down through the platform for a suitable distance. l Frepresents a cross-head,which slides vertcally on the guide-rod, and isprovided with downward-extending tubular sleeves G,which Work on theguide-rods. The central portion of the crosshead is arched, as shown,and from the upper side of the arch depends an eyebolt, H.

Each of the doors C is provided on its inner side, at one end,with abracket-plate, I.

K represents a pair of links, which connect the ends of the cross-head Fto the ears of the bracket-plates I. Each link is composed of aright-hand screw, K, the left-hand screw L, and a sleeve, M, which isinteriorly threaded and adapted to receive the inner endsv of the screwsin order to connect the same together. By turning the sleeve in onedirection it will be understood that the screws will be moved from eachother, thereby lengthening the link, and by turning the sleeve in thecontrary div rection the screws will be drawn toward each Serial No.236,00l. (No model.)

other and thereby shorten the link. By thus making the linkslongitudinally adjustable they are adapted to be so adjusted as to causethe doors to tit snugly together and upon the frame D when they areclosed, so as to ell'ectm allyl close the shaft. Y

N represents a bell crank-lever, which is fulcrumed between a pair ofknees or standards, O, that are bolted on the platform A. Thisbell-crank lever has ashort arm, P, and a long arm, R. The outer end ofthe short arm is pivoted to the lower end of a connecting-rod,

S, and the upper end of the said connecting` rod is pivoted to the eyeof the bolt H by means of a bolt, T, and thereby connected to thecross-head.

U representsafoot-lever, which is fulcrumed on the same bolt or pin withthe bell crank lever, the latter being provided with an opening at itsfulcrum to receive the foot-lever, and the short arm of the saidVfoot-lever is adapted to bear under the short arm P of the bell-cranklever, for the purpose to be hereinafter explained.

V represents a vertical seg1nent-plate,which is bolted on the platformA, and bears against one side of the bellcrank lever. segment-plate hasa notch,V, formed in its upper edge at a suitable point.

X represents a spring-actuated locking-bolt, with which the long arm ofthe bellcrank lever is provided. The said locking-bolt is adaptedtoengage the notch V, and is operated by a handle, Y,which is fulcrumed tothe long arm ofthe bell-crank lever, near the upper end thereof.

The operation of my invention is as follows: When the upper end of thebell-crank lever is turned to the right, the short arm thereof drawsdownward on the connecting-rod T and causes the cross-head F to descendon the guide-rods, and as the cross-head is connected to the door C bymeans of the links K, it follows that the said doors are caused to closetogether and on the upper inclined sides of the frame D. Then the upperend of the bell-crank lever is moved to the left, the cross-head iscaused to rise and thereby force the doors apart and open the same` andby the time that the long arm ofthe bell'crank lever has assumed aposition alongside the notch W the spring-actuated vbolt X drops intothe said notch, and

The said IOC thereby looks the bell-crank lever to the segment-plate,and consequently locks the doors in an open position, as shown in Fig.2. The foot-lever serves to `aid the operator in moving the bell cranklever,e as it enables the operator to stand upon the outer end of thefoot-lever, thus causing his Weight to be utilized in assisting to workthe lever.

Having thus described my invention, I Clam-- 1. The combination of thedoors C, hinged at their outer sides and adapted to close together, thevertically-movable erosshead, the links connecting the cross-head to thedoors, and the lever to operate the cross-head and thereby open andclose the doors,snbstantiall y as described.

2. The combination ofthe frameD,the doors G,liinged thereto at theirouter sides, the vertically-movable cross-head F,longitudinallyadjustablelinks connecting the said cross-head to thedoor, and the lever to raise and lower the cross-head and thereby openand close the doors, substantially as described.

3. The combination of the frame D,thedoors 0,'hinged thereto at theirouter sides and adapted to close together', the vertieally-lnovableerosshead, the links connecting the same to the door, the bell-cranklever connected to the cross-head, and devices, substantially as setforth, to lock the lever when the doors are opened, substantially asdescribed.

4. In combination with the hinged doors C, the guide-rods, thecross-head moving on the guide-rods and having depending tubes to slideover the rods, the links connecting the crossliead to the doors, and theoperating-lever, as set forth.

In testimony that I claim the foregoing as my own I have hereto afxed mysignature in presence of two witnesses.

PARKER STEYES.

'Vil-xiesses:

CHARLIE PETERSON, DANIEL A. BRnEsE.

